The Zoggs Centre Snorkel - improve your swimming technique without focusing on head movement. One of the best valued snorkels for swim training. Perfect with swim goggles or swim cap Features: Hydro-dynamically designed Vylux and Phthalate free snorkel tube Adjustable rubber head bracket for secure fit and reinforced split yoke strap Soft Medical Grade Silicone mouth piece One-Way purge valve for clear and easy breathing Nose clip included